The new line of circuit breaker IZM Electronic overcurrent releases

The new line of circuit breaker IZM Electronic overcurrent releases First I want to present an overview of the electronic overcurrent releases (short form: trip units) with more details. Because this is the most important device of the IZM circuit breaker.

The new line of circuit breaker IZM Electronic overcurrent releases Overview of the electronic overcurrent releases Which features are the same for all types? Additional features for type V, U, R and D Special features for type U, R and D Graphical display How to do the settings? Characteristics

Trip units: Types of electronic overcurrent releases - overview - The new line of circuit breaker IZM Trip units: Types of electronic overcurrent releases - overview - XZMA XZMV XZMV+XT XZMU (+XT) XZMR (+XT) XZMD (+XT) XZMA XZMV XZMV XZMU XZMR XZMD L-I L-S-I L-S-I-N-G L-S-I (-N-G) L-S-I (-N-G) L-S-I (-N-G) Earth fault protection ‚XT‘ is optional and for type ‚U‘, ‚R‘ and ‚D‘ even modular for retrofitting.

The new line of circuit breaker IZM Trip units: Types of electronic overcurrent releases XZMA Release for power distribution system protection XZMV Release for selective (discriminative) protection XZMU Release for universal protection XZMR Digital release, for external parameterization only XZMD Digital release Circuit breaker with trip units type ‘U’, ‘R’ and ‘D’ are already equipped with the internal system bus

The new line of circuit breaker IZM Trip units: The different protective ranges IZM trip units: L Inverse time-delay overLoad range A, V, V+XT, U, R, D S Short-time delay short-circuit tripping V, V+XT, U, R, D I Instantaneous short-circuit tripping A, V, V+XT, U, R, D N Neutral conductor overload tripping V+XT, U, R, D G Earth fault tripping (Ground fault) V+XT, U+XT(A), R+XT(A), D+XT(A) +XT = earth-fault release additional equipment

The new line of circuit breaker IZM Trip units: Same features for all types XZMA Mechanical reset: • indicates a tripping because of overload, short circuit or earth fault • press tripped indicator until it latches for reset of the mechanical reclosing lockout and XHIA • optional: automatic reset XFR • optional: safety lock for the tripped indicator prohibits accidental resetting of the mechanical reclosing lockout NEW NEW

The new line of circuit breaker IZM Trip units: Same features for all types NEW XZMA LED indicators ACTIVE-LED (flashing green light): overcurrent release is activated = enough supply from the internal current transformers or from an external source (possible for type U, R, D) ALARM-LED (continuously yellow light): overload alarm, is displayed if the load is higher than the current setting Ir

The new line of circuit breaker IZM Trip units: Same features for all types XZMA NEW Rating Plug In = 3200 A ERROR Error will be displayed with: • Microprozessor error • Internal system bus error • Memory test error • Temperature sensor • Setting error • Rating Plug is missing or defective

The new line of circuit breaker IZM Trip units: Same features for all types XZMA Sealing eyelet for the optional sealing cover XHB(G)

The new line of circuit breaker IZM Trip units: Same features for all types XZMA Test socket for connection to the test device also used for connection to XEM-PG(E) with types U, R, D LED for operating voltage indication Control buttons 6 LEDs to show test result

The new line of circuit breaker IZM Trip units: Additional features for type V, U, R and D Rating Plug In = 3200 A T. U. ERROR XZMV NEW Rating Plug: • plug in version / changeable • responsible for rated current In of IZM • range of rated current: 250A-6300A Take into account: All adjustments are based on the rated current In!

The new line of circuit breaker IZM Trip units: Additional features for type V, U, R and D standard now XZMV Differentiated trip indication Indication of the trip reason: - overload (phases or N-conductor) - short circuit (delayed trip) - short circuit (instantaneous trip) - ground fault Indicator is illuminated, if protocol-button is pressed

The new line of circuit breaker IZM Trip units: Additional features for type V, U, R and D XZMV Selective protection Delayed short circuit release Isd = 1.25 ... 12 x In (up to 0.8 x Icw for type R, D) tsd = 0; 20 (M); 100 ... 400 ms for type V with OFF-setting for type U, R, D with tsd up to 4000 ms for type R, D (at reduced Isd) M: special adjustment for motor protection with single phase sensitivity NEW

The new line of circuit breaker IZM Trip units: Additional features for type V, U, R and D TEST PROTOCOL CLEAR XZMV standard now Test buttons Test: Internal self test with or without tripping Protocol: Finding the cause of trip Clear: - Interrupt the test - clear memory (cause of trip)

The new line of circuit breaker IZM Trip units: Additional features for type V, U, R and D XZMV Earth fault protection XZMV+XT modificated trip unit only available as plus type (not for retrofitting) A B C D E The current setting is depending on the frame size of the breaker. As reference you‘ll find a small glew lable on the front panel.

The new line of circuit breaker IZM Trip units: Special features for type U, R and D Modular earth fault protection modular and suitable for retrofitting available as a single- and plus-type two different modifications: only alarm function with alarm and trip function XZMU XZMR XZMD

The new line of circuit breaker IZM Trip units: Special features for type U Optional 4-line display for universal trip unit: LCD-display, very good readable because mounted with an angle of 15°, can be turned in vertical direction by 180°. Installed with downward inclination Installed with upward inclination NEW

The new line of circuit breaker IZM Trip units: Special features for type U, R, D Standard DIP switches 1. Thermal memory - can be switched on/off 2. Neutral protection: - adjustable to 50% or 100% protection 3. Changing from I²t to I4t - adjustment of the characteristic in the overload range (for improved selectivity to fuses in the middle voltage) XZMU NEW

The new line of circuit breaker IZM Trip units: Special features for type U, R, D XZMU Modification of the characteristic Overload range: Standard: I²t = const. modification: I4t = const. for improved selectivity to (middle voltage) fuses Short time delayed short circuit range: standard: Isd = const. modification: I²tsd = const. (by using „I²tsd“-setting instead of „tsd“-setting) for improved selectivity to downstream fuses NEW

The new line of circuit breaker IZM Trip units: Special features for type U, R, D XZMU Instantaneous short circuit release Adjustment: Ii = 1.5 ... 12 In Ii = MAX Attention: MAX = 0,8 x Icw Ii = OFF Attention: OFF: Ics = Icw ! ! Ics = rated service short-circuit breaking capacity Icw = rated short-time withstand current

The new line of circuit breaker IZM Trip units: Special features for type U, R, D XZMU Instantaneous short circuit release Calculating MAX and OFF Example: IZMH2-U1600 - Ics= 100 kA /440VAC - Icw= 85 kA/ 0,5s => MAX = 0.8 x Icw= 68 kA => OFF = Ics= Icw= 85 kA/440VAC

The new line of circuit breaker IZM Trip units: Special features for digital types R and D XZMR higher settings possible: e.g. - tsd up to 4 s - Isd up to 0.8 x Icw - 200% protection for neutral conductor adjustment of settings in smaller steps possible grahic display for type D (standard)

The new line of circuit breaker IZM Trip units: Digital overcurrent release XZMD XZMD Grafic LCD enables a text output with 8 lines or the graphical representation of characteristics. it is used both to display data and to parameterise the overcurrent release as well as the metering function. the display is operated through the operation keys

The new line of circuit breaker IZM Grafic LCD: Display design Trip units: Digital overcurrent release XZMD Grafic LCD: Display design Menu title 8-line alphanumeric display or graphical representation Status line

The new line of circuit breaker IZM Grafic LCD: Status line Trip units: Digital overcurrent release XZMD Grafic LCD: Status line Access with password only Maintenance required Parameter set adjusted for protection functions (4) Edit feature (5) Adjusted trigger (6) Possibilities of action

Trip units: Digital overcurrent release XZMD The new line of circuit breaker IZM Trip units: Digital overcurrent release XZMD Grafic LCD: Navigation in the menu structure

The new line of circuit breaker IZM Trip units: Digital overcurrent release XZMD Grafic LCD is displaying both: numerical values and graphical form Lowest measured value Present measured value Highest measured value (4) 100% of the measured parameter (5) Width of display

The new line of circuit breaker IZM Trip units: Digital overcurrent release with exclusive external configuration XZMR XZMR Application: no access on site is allowed because high security is requested installation in public areas No operating on site, no display available. Parameterization only via parameter assignment module PG(E) or via PROFIBUS communication. Ordering: Digital type with additional plus type +IZM-XZMR ! Always including COM-DP module and Breakter Status Sensor XBSS !

The new line of circuit breaker IZM Trip units: How to do the settings 4 protective ranges: „L“ Overload protection „S“ Short-time delay short-circuit prot. „I“ Instantaneous short-circuit protection „G“ Earth-fault protection For each range all functions in one horizontal line: Current setting Graph with accentuated range LED for differentiated trip cause indication Delay time 1. 2. 3. 4.

The new line of circuit breaker IZM Trip units: Characteristics

The new line of circuit breaker IZM Trip units: Characteristics

The new line of circuit breaker IZM Trip units: Characteristics